chrclmnky

<?php function diww_add_post_content($content) {
	if (is_single()) {
		$content .= '<p><div id="newsletter-box">Please subscribe to <a title="Do More With WordPress" href="http://www.doitwithwp.com/go/newsletter">our newsletter</a></div></p>';
	}
	return $content;
}

add_filter ('the_content', 'diww_add_post_content', 0);